[Healeys] Power band of two different motors, or is it the rear end?

[Eric (Rick) Wilkins]

WHat are the cams in the two engines. Those alone can make a serious
difference.

On Jul 7, 2011, at 9:42 PM, Jerry Costanzo wrote:

> I have two Healeys,  one is a BN4 with a 3000 engine, HD8 carbs and
> a 4.1
> differential.  The other is a BJ8 with a 3000 engine , HD8 carbs and
> a 3.9
> differential.  I built both engines.  The BN4 is 30 over and the BJ8
> is stock.
> The BN4 head has been slightly ported, not on the BJ8.  The BJ8 has
> headers.
> Driving he BN4 today gives me the impression that it has more
> horsepower.  I
> was on the freeway and if you step on it, it will accelerate away.
> I still
> donbt feel that on the BJ8.  It accelerates, but nothing like the
> earlier
> car.
> Is it the rear end difference or did my slight porting (clean up of
> the ports
> for the most part) make that much difference?  The only other thing
> I donbt
> know is the cam profile on the BN4.  The car was raced before I got
> it and the
> machine shop said it was still in good shape so I put it in the
> engine.
>
> Opinions?
>
> Jerry
> BN4
> BJ8